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emacs/lisp/emulation/viper-macs.el
Paul Eggert 0e963201d0 Update copyright year to 2016 
Run admin/update-copyright.
2016-01-01 01:34:24 -08:00

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;;; viper-macs.el --- functions implementing keyboard macros for Viper
;; Copyright (C) 1994-1997, 2000-2016 Free Software Foundation, Inc.
;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
;; Package: viper
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(provide 'viper-macs)
;; compiler pacifier
(defvar viper-ex-work-buf)
(defvar viper-custom-file-name)
(defvar viper-current-state)
(defvar viper-fast-keyseq-timeout)
(require 'viper-mous)
(require 'viper-ex)
;; end pacifier
(require 'viper-util)
(require 'viper-keym)
;;; Variables
;; Register holding last macro.
(defvar viper-last-macro-reg nil)
;; format of the elements of kbd alists:
;; (name ((buf . macr)...(buf . macr)) ((maj-mode . macr)...) (t . macr))
;; kbd macro alist for Vi state
(defvar viper-vi-kbd-macro-alist nil)
;; same for insert/replace state
(defvar viper-insert-kbd-macro-alist nil)
;; same for emacs state
(defvar viper-emacs-kbd-macro-alist nil)
;; Internal var that passes info between start-kbd-macro and end-kbd-macro
;; in :map and :map!
(defvar viper-kbd-macro-parameters nil)
(defvar viper-this-kbd-macro nil
"Vector of keys representing the name of currently running Viper kbd macro.")
(defvar viper-last-kbd-macro nil
"Vector of keys representing the name of last Viper keyboard macro.")
(defcustom viper-repeat-from-history-key 'f12
"Prefix key for accessing previously typed Vi commands.
The previous command is accessible, as usual, via `.'. The command before this
can be invoked as `<this key> 1', and the command before that, and the command
before that one is accessible as `<this key> 2'.
The notation for these keys is borrowed from XEmacs. Basically,
a key is a symbol, e.g., `a', `\\1', `f2', etc., or a list, e.g.,
`(meta control f1)'."
:type 'sexp
:group 'viper)
;;; Code
(declare-function viper-change-state-to-insert "viper-cmd" ())
;; Ex map command
(defun ex-map ()
(let ((mod-char "")
macro-name macro-body map-args ins)
(save-window-excursion
(set-buffer viper-ex-work-buf)
(if (looking-at "!")
(progn
(setq ins t
mod-char "!")
(forward-char 1))))
(setq map-args (ex-map-read-args mod-char)
macro-name (car map-args)
macro-body (cdr map-args))
(setq viper-kbd-macro-parameters (list ins mod-char macro-name macro-body))
(if macro-body
(viper-end-mapping-kbd-macro 'ignore)
(ex-fixup-history (format "map%s %S" mod-char
(viper-display-macro macro-name)))
;; if defining macro for insert, switch there for authentic WYSIWYG
(if ins (viper-change-state-to-insert))
(start-kbd-macro nil)
(define-key viper-vi-intercept-map "\C-x)" 'viper-end-mapping-kbd-macro)
(define-key viper-insert-intercept-map "\C-x)" 'viper-end-mapping-kbd-macro)
(define-key viper-emacs-intercept-map "\C-x)" 'viper-end-mapping-kbd-macro)
(message "Mapping %S in %s state. Type macro definition followed by `C-x )'"
(viper-display-macro macro-name)
(if ins "Insert" "Vi")))
))
;; Ex unmap
(defun ex-unmap ()
(let ((mod-char "")
temp macro-name ins)
(save-window-excursion
(set-buffer viper-ex-work-buf)
(if (looking-at "!")
(progn
(setq ins t
mod-char "!")
(forward-char 1))))
(setq macro-name (ex-unmap-read-args mod-char))
(setq temp (viper-fixup-macro (vconcat macro-name))) ;; copy and fixup
(ex-fixup-history (format "unmap%s %S" mod-char
(viper-display-macro temp)))
(viper-unrecord-kbd-macro macro-name (if ins 'insert-state 'vi-state))
))
;; read arguments for ex-map
(defun ex-map-read-args (variant)
(let ((cursor-in-echo-area t)
(key-seq [])
temp key event message
macro-name macro-body args)
(condition-case nil
(setq args (concat (ex-get-inline-cmd-args ".*map[!]*[ \t]?" "\n\C-m")
" nil nil ")
temp (read-from-string args)
macro-name (car temp)
macro-body (car (read-from-string args (cdr temp))))
(error
(signal
'error
'("map: Macro name and body must be a quoted string or a vector"))))
;; We expect macro-name to be a vector, a string, or a quoted string.
;; In the second case, it will emerge as a symbol when read from
;; the above read-from-string. So we need to convert it into a string
(if macro-name
(cond ((vectorp macro-name) nil)
((stringp macro-name)
(setq macro-name (vconcat macro-name)))
(t (setq macro-name (vconcat (prin1-to-string macro-name)))))
(message ":map%s <Macro Name>" variant)(sit-for 2)
(while
(not (member key
'(?\C-m ?\n (control m) (control j) return linefeed)))
(setq key-seq (vconcat key-seq (if key (vector key) [])))
;; the only keys available for editing are these-- no help while there
(if (member
key
'(?\b ?\d '^? '^H (control h) (control \?) backspace delete))
(setq key-seq (viper-subseq key-seq 0 (- (length key-seq) 2))))
(setq message
(format
":map%s %s"
variant (if (> (length key-seq) 0)
(prin1-to-string (viper-display-macro key-seq))
"")))
(message "%s" message)
(setq event (viper-read-key))
;;(setq event (viper-read-event))
(setq key
(if (viper-mouse-event-p event)
(progn
(message "%s (No mouse---only keyboard keys, please)"
message)
(sit-for 2)
nil)
(viper-event-key event)))
)
(setq macro-name key-seq))
(if (= (length macro-name) 0)
(error "Can't map an empty macro name"))
(setq macro-name (viper-fixup-macro macro-name))
(if (viper-char-array-p macro-name)
(setq macro-name (viper-char-array-to-macro macro-name)))
(if macro-body
(cond ((viper-char-array-p macro-body)
(setq macro-body (viper-char-array-to-macro macro-body)))
((vectorp macro-body) nil)
(t (error "map: Invalid syntax in macro definition"))))
(setq cursor-in-echo-area nil)(sit-for 0) ; this overcomes xemacs tty bug
(cons macro-name macro-body)))
;; read arguments for ex-unmap
(defun ex-unmap-read-args (variant)
(let ((cursor-in-echo-area t)
(macro-alist (if (string= variant "!")
viper-insert-kbd-macro-alist
viper-vi-kbd-macro-alist))
;; these are disabled just in case, to avoid surprises when doing
;; completing-read
viper-vi-kbd-minor-mode viper-insert-kbd-minor-mode
viper-emacs-kbd-minor-mode
viper-vi-intercept-minor-mode viper-insert-intercept-minor-mode
viper-emacs-intercept-minor-mode
event message
key key-seq macro-name)
(setq macro-name (ex-get-inline-cmd-args ".*unma?p?[!]*[ \t]*"))
(if (> (length macro-name) 0)
()
(message ":unmap%s <Name>" variant) (sit-for 2)
(while
(not
(member key '(?\C-m ?\n (control m) (control j) return linefeed)))
(setq key-seq (vconcat key-seq (if key (vector key) [])))
;; the only keys available for editing are these-- no help while there
(cond ((member
key
'(?\b ?\d '^? '^H (control h) (control \?) backspace delete))
(setq key-seq (viper-subseq key-seq 0 (- (length key-seq) 2))))
((member key '(tab (control i) ?\t))
(setq key-seq (viper-subseq key-seq 0 (1- (length key-seq))))
(setq message
(format
":unmap%s %s"
variant (if (> (length key-seq) 0)
(prin1-to-string
(viper-display-macro key-seq))
"")))
(setq key-seq
(viper-do-sequence-completion key-seq macro-alist message))
))
(setq message
(format
":unmap%s %s"
variant (if (> (length key-seq) 0)
(prin1-to-string
(viper-display-macro key-seq))
"")))
(message "%s" message)
(setq event (viper-read-key))
;;(setq event (viper-read-event))
(setq key
(if (viper-mouse-event-p event)
(progn
(message "%s (No mouse---only keyboard keys, please)"
message)
(sit-for 2)
nil)
(viper-event-key event)))
)
(setq macro-name key-seq))
(if (= (length macro-name) 0)
(error "Can't unmap an empty macro name"))
;; convert macro names into vector, if starts with a `['
(if (memq (elt macro-name 0) '(?\[ ?\"))
(car (read-from-string macro-name))
(vconcat macro-name))
))
(declare-function viper-change-state-to-vi "viper-cmd" ())
;; Terminate a Vi kbd macro.
;; optional argument IGNORE, if t, indicates that we are dealing with an
;; existing macro that needs to be registered, but there is no need to
;; terminate a kbd macro.
(defun viper-end-mapping-kbd-macro (&optional ignore)
(interactive)
(define-key viper-vi-intercept-map "\C-x)" nil)
(define-key viper-insert-intercept-map "\C-x)" nil)
(define-key viper-emacs-intercept-map "\C-x)" nil)
(if (and (not ignore)
(or (not viper-kbd-macro-parameters)
(not defining-kbd-macro)))
(error "Not mapping a kbd-macro"))
(let ((mod-char (nth 1 viper-kbd-macro-parameters))
(ins (nth 0 viper-kbd-macro-parameters))
(macro-name (nth 2 viper-kbd-macro-parameters))
(macro-body (nth 3 viper-kbd-macro-parameters)))
(setq viper-kbd-macro-parameters nil)
(or ignore
(progn
(end-kbd-macro nil)
(setq macro-body (viper-events-to-macro last-kbd-macro))
;; always go back to Vi, since this is where we started
;; defining macro
(viper-change-state-to-vi)))
(viper-record-kbd-macro macro-name
(if ins 'insert-state 'vi-state)
(viper-display-macro macro-body))
(ex-fixup-history (format "map%s %S %S" mod-char
(viper-display-macro macro-name)
(viper-display-macro macro-body)))
))
;;; Recording, unrecording, executing
;; Accepts as macro names: strings and vectors.
;; strings must be strings of characters; vectors must be vectors of keys
;; in canonical form, which is essentially the form used in XEmacs.
;; More general definitions are inherited by more specific scopes:
;; global->major mode->buffer. More specific definitions override more general
(defun viper-record-kbd-macro (macro-name state macro-body &optional scope)
"Record a Vi macro.
Can be used in `viper-custom-file-name' to define permanent macros.
MACRO-NAME is a string of characters or a vector of keys. STATE is
either `vi-state' or `insert-state'. It specifies the Viper state in which to
define the macro. MACRO-BODY is a string that represents the keyboard macro.
Optional SCOPE says whether the macro should be global \(t), mode-specific
\(a major-mode symbol), or buffer-specific \(buffer name, a string).
If SCOPE is nil, the user is asked to specify the scope."
(let* (state-name keymap
(macro-alist-var
(cond ((eq state 'vi-state)
(setq state-name "Vi state"
keymap viper-vi-kbd-map)
'viper-vi-kbd-macro-alist)
((memq state '(insert-state replace-state))
(setq state-name "Insert state"
keymap viper-insert-kbd-map)
'viper-insert-kbd-macro-alist)
(t
(setq state-name "Emacs state"
keymap viper-emacs-kbd-map)
'viper-emacs-kbd-macro-alist)
))
new-elt old-elt old-sub-elt msg
temp lis lis2)
(if (= (length macro-name) 0)
(error "Can't map an empty macro name"))
;; Macro-name is usually a vector. However, command history or macros
;; recorded in viper-custom-file-name may be recorded as strings.
;; So, convert to vectors.
(setq macro-name (viper-fixup-macro macro-name))
(if (viper-char-array-p macro-name)
(setq macro-name (viper-char-array-to-macro macro-name)))
(setq macro-body (viper-fixup-macro macro-body))
(if (viper-char-array-p macro-body)
(setq macro-body (viper-char-array-to-macro macro-body)))
;; don't ask if scope is given and is of the right type
(or (eq scope t)
(stringp scope)
(and scope (symbolp scope))
(progn
(setq scope
(cond
((y-or-n-p
(format-message
"Map this macro for buffer `%s' only? "
(buffer-name)))
(setq msg
(format-message
"%S is mapped to %s for %s in `%s'"
(viper-display-macro macro-name)
(viper-abbreviate-string
(format
"%S"
(setq temp (viper-display-macro macro-body)))
14 "" ""
(if (stringp temp) " ....\"" " ....]"))
state-name (buffer-name)))
(buffer-name))
((y-or-n-p
(format-message
"Map this macro for the major mode `%S' only? "
major-mode))
(setq msg
(format-message
"%S is mapped to %s for %s in `%S'"
(viper-display-macro macro-name)
(viper-abbreviate-string
(format
"%S"
(setq temp (viper-display-macro macro-body)))
14 "" ""
(if (stringp macro-body) " ....\"" " ....]"))
state-name major-mode))
major-mode)
(t
(setq msg
(format
"%S is globally mapped to %s in %s"
(viper-display-macro macro-name)
(viper-abbreviate-string
(format
"%S"
(setq temp (viper-display-macro macro-body)))
14 "" ""
(if (stringp macro-body) " ....\"" " ....]"))
state-name))
t)))
(if (y-or-n-p
(format "Save this macro in %s? "
(viper-abbreviate-file-name viper-custom-file-name)))
(viper-save-string-in-file
(format "\n(viper-record-kbd-macro %S '%S %s '%S)"
(viper-display-macro macro-name)
state
;; if we don't let vector macro-body through %S,
;; the symbols `\.' `\[' etc will be converted into
;; characters, causing invalid read error on recorded
;; macros in viper-custom-file-name.
;; I am not sure is macro-body can still be a string at
;; this point, but I am preserving this option anyway.
(if (vectorp macro-body)
(format "%S" macro-body)
macro-body)
scope)
viper-custom-file-name))
(message "%s" msg)
))
(setq new-elt
(cons macro-name
(cond ((eq scope t) (list nil nil (cons t nil)))
((symbolp scope)
(list nil (list (cons scope nil)) (cons t nil)))
((stringp scope)
(list (list (cons scope nil)) nil (cons t nil))))))
(setq old-elt (assoc macro-name (eval macro-alist-var)))
(if (null old-elt)
(progn
;; insert new-elt in macro-alist-var and keep the list sorted
(define-key
keymap
(vector (viper-key-to-emacs-key (aref macro-name 0)))
'viper-exec-mapped-kbd-macro)
(setq lis (eval macro-alist-var))
(while (and lis (string< (viper-array-to-string (car (car lis)))
(viper-array-to-string macro-name)))
(setq lis2 (cons (car lis) lis2))
(setq lis (cdr lis)))
(setq lis2 (reverse lis2))
(set macro-alist-var (append lis2 (cons new-elt lis)))
(setq old-elt new-elt)))
(setq old-sub-elt
(cond ((eq scope t) (viper-kbd-global-pair old-elt))
((symbolp scope) (assoc scope (viper-kbd-mode-alist old-elt)))
((stringp scope) (assoc scope (viper-kbd-buf-alist old-elt)))))
(if old-sub-elt
(setcdr old-sub-elt macro-body)
(cond ((symbolp scope) (setcar (cdr (cdr old-elt))
(cons (cons scope macro-body)
(viper-kbd-mode-alist old-elt))))
((stringp scope) (setcar (cdr old-elt)
(cons (cons scope macro-body)
(viper-kbd-buf-alist old-elt))))))
))
;; macro name must be a vector of viper-style keys
;; viper-unrecord-kbd-macro doesn't have scope. Macro definitions are inherited
;; from global -> major mode -> buffer
;; More specific definition overrides more general
;; Can't unrecord definition for more specific, if a more general definition is
;; in effect
(defun viper-unrecord-kbd-macro (macro-name state)
"Delete macro MACRO-NAME from Viper STATE.
MACRO-NAME must be a vector of viper-style keys. This command is used
by Viper internally, but you can also use it in `viper-custom-file-name'
to delete pre-defined macros supplied with Viper. The best way to avoid
mistakes in macro names to be passed to this function is to use
`viper-describe-kbd-macros' and copy the name from there."
(let* (state-name keymap
(macro-alist-var
(cond ((eq state 'vi-state)
(setq state-name "Vi state"
keymap viper-vi-kbd-map)
'viper-vi-kbd-macro-alist)
((memq state '(insert-state replace-state))
(setq state-name "Insert state"
keymap viper-insert-kbd-map)
'viper-insert-kbd-macro-alist)
(t
(setq state-name "Emacs state"
keymap viper-emacs-kbd-map)
'viper-emacs-kbd-macro-alist)
))
buf-mapping mode-mapping global-mapping
macro-pair macro-entry)
;; Macro-name is usually a vector. However, command history or macros
;; recorded in viper-custom-file-name may appear as strings.
;; So, convert to vectors.
(setq macro-name (viper-fixup-macro macro-name))
(if (viper-char-array-p macro-name)
(setq macro-name (viper-char-array-to-macro macro-name)))
(setq macro-entry (assoc macro-name (eval macro-alist-var)))
(if (= (length macro-name) 0)
(error "Can't unmap an empty macro name"))
(if (null macro-entry)
(error "%S is not mapped to a macro for %s in `%s'"
(viper-display-macro macro-name)
state-name (buffer-name)))
(setq buf-mapping (viper-kbd-buf-pair macro-entry)
mode-mapping (viper-kbd-mode-pair macro-entry)
global-mapping (viper-kbd-global-pair macro-entry))
(cond ((and (cdr buf-mapping)
(or (and (not (cdr mode-mapping)) (not (cdr global-mapping)))
(y-or-n-p
(format-message "Unmap %S for `%s' only? "
(viper-display-macro macro-name)
(buffer-name)))))
(setq macro-pair buf-mapping)
(message "%S is unmapped for %s in `%s'"
(viper-display-macro macro-name)
state-name (buffer-name)))
((and (cdr mode-mapping)
(or (not (cdr global-mapping))
(y-or-n-p
(format-message "Unmap %S for the major mode `%S' only? "
(viper-display-macro macro-name)
major-mode))))
(setq macro-pair mode-mapping)
(message "%S is unmapped for %s in %S"
(viper-display-macro macro-name) state-name major-mode))
((cdr (setq macro-pair global-mapping))
(message
"Global mapping for %S in %s is removed"
(viper-display-macro macro-name) state-name))
(t (error "%S is not mapped to a macro for %s in `%s'"
(viper-display-macro macro-name)
state-name (buffer-name))))
(setcdr macro-pair nil)
(or (cdr buf-mapping)
(cdr mode-mapping)
(cdr global-mapping)
(progn
(set macro-alist-var (delq macro-entry (eval macro-alist-var)))
(if (viper-can-release-key (aref macro-name 0)
(eval macro-alist-var))
(define-key
keymap
(vector (viper-key-to-emacs-key (aref macro-name 0)))
nil))
))
))
;; Check if MACRO-ALIST has an entry for a macro name starting with
;; CHAR. If not, this indicates that the binding for this char
;; in viper-vi/insert-kbd-map can be released.
(defun viper-can-release-key (char macro-alist)
(let ((lis macro-alist)
(can-release t)
macro-name)
(while (and lis can-release)
(setq macro-name (car (car lis)))
(if (eq char (aref macro-name 0))
(setq can-release nil))
(setq lis (cdr lis)))
can-release))
(defun viper-exec-mapped-kbd-macro (count)
"Dispatch kbd macro."
(interactive "P")
(let* ((macro-alist (cond ((eq viper-current-state 'vi-state)
viper-vi-kbd-macro-alist)
((memq viper-current-state
'(insert-state replace-state))
viper-insert-kbd-macro-alist)
(t
viper-emacs-kbd-macro-alist)))
(unmatched-suffix "")
;; Macros and keys are executed with other macros turned off
;; For macros, this is done to avoid macro recursion
viper-vi-kbd-minor-mode viper-insert-kbd-minor-mode
viper-emacs-kbd-minor-mode
next-best-match keyseq event-seq
macro-first-char macro-alist-elt macro-body
command)
(setq macro-first-char last-command-event
event-seq (viper-read-fast-keysequence macro-first-char macro-alist)
keyseq (viper-events-to-macro event-seq)
macro-alist-elt (assoc keyseq macro-alist)
next-best-match (viper-find-best-matching-macro macro-alist keyseq))
(if (null macro-alist-elt)
(setq macro-alist-elt (car next-best-match)
unmatched-suffix (viper-subseq event-seq (cdr next-best-match))))
(cond ((null macro-alist-elt))
((setq macro-body (viper-kbd-buf-definition macro-alist-elt)))
((setq macro-body (viper-kbd-mode-definition macro-alist-elt)))
((setq macro-body (viper-kbd-global-definition macro-alist-elt))))
;; when defining keyboard macro, don't use the macro mappings
(if (and macro-body (not defining-kbd-macro))
;; block cmd executed as part of a macro from entering command history
(let ((command-history command-history))
(setq viper-this-kbd-macro (car macro-alist-elt))
(execute-kbd-macro (viper-macro-to-events macro-body) count)
(setq viper-this-kbd-macro nil
viper-last-kbd-macro (car macro-alist-elt))
(viper-set-unread-command-events unmatched-suffix))
;; If not a macro, or the macro is suppressed while defining another
;; macro, put keyseq back on the event queue
(viper-set-unread-command-events event-seq)
;; if the user typed arg, then use it if prefix arg is not set by
;; some other command (setting prefix arg can happen if we do, say,
;; 2dw and there is a macro starting with 2. Then control will go to
;; this routine
(or prefix-arg (setq prefix-arg count))
(setq command (key-binding (read-key-sequence nil)))
(if (commandp command)
(command-execute command)
(beep 1)))
))
;;; Displaying and completing macros
(defun viper-describe-kbd-macros ()
"Show currently defined keyboard macros."
(interactive)
(with-output-to-temp-buffer " *viper-info*"
(princ "Macros in Vi state:\n===================\n")
(mapc 'viper-describe-one-macro viper-vi-kbd-macro-alist)
(princ "\n\nMacros in Insert and Replace states:\n====================================\n")
(mapc 'viper-describe-one-macro viper-insert-kbd-macro-alist)
(princ "\n\nMacros in Emacs state:\n======================\n")
(mapcar 'viper-describe-one-macro viper-emacs-kbd-macro-alist)
))
(defun viper-describe-one-macro (macro)
(princ (format "\n *** Mappings for %S:\n ------------\n"
(viper-display-macro (car macro))))
(princ " ** Buffer-specific:")
(if (viper-kbd-buf-alist macro)
(mapc 'viper-describe-one-macro-elt (viper-kbd-buf-alist macro))
(princ " none\n"))
(princ "\n ** Mode-specific:")
(if (viper-kbd-mode-alist macro)
(mapc 'viper-describe-one-macro-elt (viper-kbd-mode-alist macro))
(princ " none\n"))
(princ "\n ** Global:")
(if (viper-kbd-global-definition macro)
(princ (format "\n %S" (cdr (viper-kbd-global-pair macro))))
(princ " none"))
(princ "\n"))
(defun viper-describe-one-macro-elt (elt)
(let ((name (car elt))
(defn (cdr elt)))
(princ (format "\n * %S:\n %S\n" name defn))))
;; check if SEQ is a prefix of some car of an element in ALIST
(defun viper-keyseq-is-a-possible-macro (seq alist)
(let ((converted-seq (viper-events-to-macro seq)))
(eval (cons 'or
(mapcar
(lambda (elt) (viper-prefix-subseq-p converted-seq elt))
(viper-this-buffer-macros alist))))))
;; whether SEQ1 is a prefix of SEQ2
(defun viper-prefix-subseq-p (seq1 seq2)
(let ((len1 (length seq1))
(len2 (length seq2)))
(if (<= len1 len2)
(equal seq1 (viper-subseq seq2 0 len1)))))
;; find the longest common prefix
(defun viper-common-seq-prefix (&rest seqs)
(let* ((first (car seqs))
(rest (cdr seqs))
(pref [])
(idx 0)
len)
(if (= (length seqs) 0)
(setq len 0)
(setq len (apply 'min (mapcar 'length seqs))))
(while (< idx len)
(if (eval (cons 'and
(mapcar (lambda (s) (equal (elt first idx) (elt s idx)))
rest)))
(setq pref (vconcat pref (vector (elt first idx)))))
(setq idx (1+ idx)))
pref))
;; get all sequences that match PREFIX from a given A-LIST
(defun viper-extract-matching-alist-members (pref alist)
(delq nil (mapcar (lambda (elt) (if (viper-prefix-subseq-p pref elt) elt))
(viper-this-buffer-macros alist))))
(defun viper-do-sequence-completion (seq alist compl-message)
(let* ((matches (viper-extract-matching-alist-members seq alist))
(new-seq (apply 'viper-common-seq-prefix matches))
)
(cond ((and (equal seq new-seq) (= (length matches) 1))
(message "%s (Sole completion)" compl-message)
(sit-for 2))
((null matches)
(message "%s (No match)" compl-message)
(sit-for 2)
(setq new-seq seq))
((member seq matches)
(message "%s (Complete, but not unique)" compl-message)
(sit-for 2)
(viper-display-vector-completions matches))
((equal seq new-seq)
(viper-display-vector-completions matches)))
new-seq))
(defun viper-display-vector-completions (list)
(with-output-to-temp-buffer "*Completions*"
(display-completion-list
(mapcar 'prin1-to-string
(mapcar 'viper-display-macro list)))))
;; alist is the alist of macros
;; str is the fast key sequence entered
;; returns: (matching-macro-def . unmatched-suffix-start-index)
(defun viper-find-best-matching-macro (alist str)
(let ((lis alist)
(def-len 0)
(str-len (length str))
match unmatched-start-idx found macro-def)
(while (and (not found) lis)
(setq macro-def (car lis)
def-len (length (car macro-def)))
(if (and (>= str-len def-len)
(equal (car macro-def) (viper-subseq str 0 def-len)))
(if (or (viper-kbd-buf-definition macro-def)
(viper-kbd-mode-definition macro-def)
(viper-kbd-global-definition macro-def))
(setq found t))
)
(setq lis (cdr lis)))
(if found
(setq match macro-def
unmatched-start-idx def-len)
(setq match nil
unmatched-start-idx 0))
(cons match unmatched-start-idx)))
;; returns a list of names of macros defined for the current buffer
(defun viper-this-buffer-macros (macro-alist)
(let (candidates)
(setq candidates
(mapcar (lambda (elt)
(if (or (viper-kbd-buf-definition elt)
(viper-kbd-mode-definition elt)
(viper-kbd-global-definition elt))
(car elt)))
macro-alist))
(setq candidates (delq nil candidates))))
;; if seq of Viper key symbols (representing a macro) can be converted to a
;; string--do so. Otherwise, do nothing.
(defun viper-display-macro (macro-name-or-body)
(cond ((viper-char-symbol-sequence-p macro-name-or-body)
(mapconcat 'symbol-name macro-name-or-body ""))
((viper-char-array-p macro-name-or-body)
(mapconcat 'char-to-string macro-name-or-body ""))
(t macro-name-or-body)))
;; convert sequence of events (that came presumably from emacs kbd macro) into
;; Viper's macro, which is a vector of the form
;; [ desc desc ... ]
;; Each desc is either a symbol of (meta symb), (shift symb), etc.
;; Here we purge events that happen to be lists. In most cases, these events
;; got into a macro definition unintentionally; say, when the user moves mouse
;; during a macro definition, then something like (switch-frame ...) might get
;; in. Another reason for purging lists-events is that we can't store them in
;; textual form (say, in .emacs) and then read them back.
(defun viper-events-to-macro (event-seq)
(vconcat (delq nil (mapcar (lambda (elt) (if (consp elt)
nil
(viper-event-key elt)))
event-seq))))
;; convert strings or arrays of characters to Viper macro form
(defun viper-char-array-to-macro (array)
(let ((vec (vconcat array))
macro)
(if (featurep 'xemacs)
(setq macro (mapcar 'character-to-event vec))
(setq macro vec))
(vconcat (mapcar 'viper-event-key macro))))
;; For macros bodies and names, goes over MACRO and checks if all members are
;; names of keys (actually, it only checks if they are symbols or lists
;; if a digit is found, it is converted into a symbol (e.g., 0 -> \0, etc).
;; If MACRO is not a list or vector -- doesn't change MACRO.
(defun viper-fixup-macro (macro)
(let ((len (length macro))
(idx 0)
elt break)
(if (or (vectorp macro) (listp macro))
(while (and (< idx len) (not break))
(setq elt (elt macro idx))
(cond ((numberp elt)
;; fix number
(if (and (<= 0 elt) (<= elt 9))
(cond ((arrayp macro)
(aset macro
idx
(intern (char-to-string (+ ?0 elt)))))
((listp macro)
(setcar (nthcdr idx macro)
(intern (char-to-string (+ ?0 elt)))))
)))
((listp elt)
(viper-fixup-macro elt))
((symbolp elt) nil)
(t (setq break t)))
(setq idx (1+ idx))))
(if break
(error "Wrong type macro component, symbol-or-listp, %S" elt)
macro)))
(defun viper-macro-to-events (macro-body)
(vconcat (mapcar 'viper-key-to-emacs-key macro-body)))
;;; Reading fast key sequences
;; Assuming that CHAR was the first character in a fast succession of key
;; strokes, read the rest. Return the vector of keys that was entered in
;; this fast succession of key strokes.
;; A fast keysequence is one that is terminated by a pause longer than
;; viper-fast-keyseq-timeout.
(defun viper-read-fast-keysequence (event macro-alist)
(let ((lis (vector event))
next-event)
(while (and (viper-fast-keysequence-p)
(viper-keyseq-is-a-possible-macro lis macro-alist))
;; Seems that viper-read-event is more robust here. We need to be able to
;; place these events on unread-command-events list. If we use
;; viper-read-key then events will be converted to keys, and sometimes
;; (e.g., (control \[)) those keys differ from the corresponding events.
;; So, do not use (setq next-event (viper-read-key))
(setq next-event (viper-read-event))
(or (viper-mouse-event-p next-event)
(setq lis (vconcat lis (vector next-event)))))
lis))
;;; Keyboard macros in registers
;; sets register to last-kbd-macro carefully.
(defun viper-set-register-macro (reg)
(if (get-register reg)
(if (y-or-n-p "Register contains data. Overwrite? ")
()
(error
"Macro not saved in register. Can still be invoked via `C-x e'")))
(set-register reg last-kbd-macro))
(defun viper-register-macro (count)
"Keyboard macros in registers - a modified @ command."
(interactive "P")
(let ((reg (downcase (read-char))))
(cond ((or (and (<= ?a reg) (<= reg ?z)))
(setq viper-last-macro-reg reg)
(if defining-kbd-macro
(progn
(end-kbd-macro)
(viper-set-register-macro reg))
(execute-kbd-macro (get-register reg) count)))
((or (= ?@ reg) (= ?\^j reg) (= ?\^m reg))
(if viper-last-macro-reg
nil
(error "No previous kbd macro"))
(execute-kbd-macro (get-register viper-last-macro-reg) count))
((= ?\# reg)
(start-kbd-macro count))
((= ?! reg)
(setq reg (downcase (read-char)))
(if (or (and (<= ?a reg) (<= reg ?z)))
(progn
(setq viper-last-macro-reg reg)
(viper-set-register-macro reg))))
(t
(error "`%c': Unknown register" reg)))))
(defun viper-global-execute ()
"Call last keyboard macro for each line in the region."
(if (> (point) (mark t)) (exchange-point-and-mark))
(beginning-of-line)
(call-last-kbd-macro)
(while (< (point) (mark t))
(forward-line 1)
(beginning-of-line)
(call-last-kbd-macro)))
;;; viper-macs.el ends here
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